About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
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| Presentation Title |
Coarsening of Si particles during heat treatment of LPBF AlSi10Mg characterized by a combination of synchrotron nanotomography and laboratory 3D micro-beam X-Ray diffraction |
| Author(s) |
Marion Defer, Soumyadeep Dasgupta , Ashwin Shahani, Xianghui Xiao, Jacob Bowen, Trygve Ræder , Adriaan Van Roosmalen, Erik Lauridsen, Dorte Juul Jensen , Yubin Zhang |
| On-Site Speaker (Planned) |
Marion Defer |
| Abstract Scope |
Although the as-printed microstructure of Laser Powder Bed Fusion processed AlSi10Mg has been well studied, the 3D evolution and coarsening kinetics of Si particles during post-processing heat treatments remain poorly understood, despite their critical role in tailoring mechanical properties.
This study investigates Si particle evolution during annealing, using synchrotron X-ray nanotomography after successive annealing steps at 520 °C, followed by laboratory 3D micro-beam X-ray diffraction (Lab-3DµXRD). Nanotomography, enhanced by phase contrast through defocusing and machine learning-assisted segmentation, enabled 3D visualization of Si particles. Lab-3DµXRD provided additional crystallographic and grain boundary information on the surrounding Al matrix.
By combining these complementary techniques, this work reveals how Si particles develop during annealing through fragmentation of the AlSi network at cell and grain boundaries and analyzes the role of these boundaries as potential diffusion pathways for Si throughout the annealing process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Other |